In the 6th Bond film, You Only Live Twice (1967) , one of Blofeld's possessions is a Madonna of Hans Holbein, best exemplified as the Darmstadt Madonna:
What is the reason it is in the film? I know ...

Early in Dr. No, M tells Bond to stop using a Beretta -- which Bond seems to prefer -- and start using a Walther PPK. They explicitly discuss the rationale. M even confiscates Bond's Beretta.
Several ...

When Blofeld leaves the control center in You Only Live Twice, he gives the keys to self-destruct to his bodyguard, Hans.
Why did he do that, as opposed to just throwing the key out into the piranha ...